›› 2014, Vol. 23 ›› Issue (8): 89201-089201.doi: 10.1088/1674-1056/23/8/089201

• GEOPHYSICS, ASTRONOMY, AND ASTROPHYSICS • 上一篇    下一篇

An approach to estimating and extrapolating model error based on inverse problem methods:towards accurate numerical weather prediction

胡淑娟a, 邱春雨a b, 张利云b, 黄启灿a b, 于海鹏a, 丑纪范a   

  1. a College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, China;
    b School of Mathematics and Statistics, Lanzhou University, Lanzhou 730000, China
  • 收稿日期:2013-12-17 修回日期:2014-01-29 出版日期:2014-08-15 发布日期:2014-08-15
  • 基金资助:
    Project supported by the Special Scientific Research Project for Public Interest (Grant No. GYHY201206009), the Fundamental Research Funds for the Central Universities, China (Grant Nos. lzujbky-2012-13 and lzujbky-2013-11), and the National Basic Research Program of China (Grant Nos. 2012CB955902 and 2013CB430204).

An approach to estimating and extrapolating model error based on inverse problem methods:towards accurate numerical weather prediction

Hu Shu-Juan (胡淑娟)a, Qiu Chun-Yu (邱春雨)a b, Zhang Li-Yun (张利云)b, Huang Qi-Can (黄启灿)a b, Yu Hai-Peng (于海鹏)a, Chou Ji-Fan (丑纪范)a   

  1. a College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, China;
    b School of Mathematics and Statistics, Lanzhou University, Lanzhou 730000, China
  • Received:2013-12-17 Revised:2014-01-29 Online:2014-08-15 Published:2014-08-15
  • Contact: Hu Shu-Juan E-mail:hushuju@lzu.edu.cn
  • Supported by:
    Project supported by the Special Scientific Research Project for Public Interest (Grant No. GYHY201206009), the Fundamental Research Funds for the Central Universities, China (Grant Nos. lzujbky-2012-13 and lzujbky-2013-11), and the National Basic Research Program of China (Grant Nos. 2012CB955902 and 2013CB430204).

摘要: Model error is one of the key factors restricting the accuracy of numerical weather prediction (NWP). Considering the continuous evolution of the atmosphere, the observed data (ignoring the measurement error) can be viewed as a series of solutions of an accurate model governing the actual atmosphere. Model error is represented as an unknown term in the accurate model, thus NWP can be considered as an inverse problem to uncover the unknown error term. The inverse problem models can absorb long periods of observed data to generate model error correction procedures. They thus resolve the deficiency and faultiness of the NWP schemes employing only the initial-time data. In this study we construct two inverse problem models to estimate and extrapolate the time-varying and spatial-varying model errors in both the historical and forecast periods by using recent observations and analogue phenomena of the atmosphere. Numerical experiment on Burgers' equation has illustrated the substantial forecast improvement using inverse problem algorithms. The proposed inverse problem methods of suppressing NWP errors will be useful in future high accuracy applications of NWP.

关键词: numerical weather prediction, model error, past data, inverse problem

Abstract: Model error is one of the key factors restricting the accuracy of numerical weather prediction (NWP). Considering the continuous evolution of the atmosphere, the observed data (ignoring the measurement error) can be viewed as a series of solutions of an accurate model governing the actual atmosphere. Model error is represented as an unknown term in the accurate model, thus NWP can be considered as an inverse problem to uncover the unknown error term. The inverse problem models can absorb long periods of observed data to generate model error correction procedures. They thus resolve the deficiency and faultiness of the NWP schemes employing only the initial-time data. In this study we construct two inverse problem models to estimate and extrapolate the time-varying and spatial-varying model errors in both the historical and forecast periods by using recent observations and analogue phenomena of the atmosphere. Numerical experiment on Burgers' equation has illustrated the substantial forecast improvement using inverse problem algorithms. The proposed inverse problem methods of suppressing NWP errors will be useful in future high accuracy applications of NWP.

Key words: numerical weather prediction, model error, past data, inverse problem

中图分类号:  (Weather analysis and prediction)

  • 92.60.Wc